The NFL’s estimated total worth is higher than the gross national product of many countries around the world. Yet, many of the franchises still are just family affairs.

Mark Davis is the latest to make his mark. He’s a chip off the old rebel with a cause.

The Raiders pulled off a dramatic deadline deal Tuesday by acquiring Bengals erstwhile quarterback Carson Palmer for a first-round draft choice in 2012 and a first- or second- round pick in 2013.

The Raiders’ Mark Davis and the Bengals’ Mike Brown are sons of two of professional football’s most iconic leaders — Al Davis, who died Oct. 8, and Paul Brown, who died in 1991.

Al Davis had been coach, general manager, managing general partner and owner of the Raiders. The Raiders lighted an eternal flame at their stadium in his memory Sunday. Paul Brown was coach, general manager and principal owner of the Bengals and, at one time, the ex-Cleveland Browns. The Browns were named for him; the stadium in Cincinnati is named in his honor.

This is just the kind of controversial, high-risk, high-reward deal Al and Paul would have made back in the old American Football League.

The 56-year-old Mark Davis has been very much in the background for most of his life as the only son of Al Davis, but out front in Houston talking to players before the first game after his father’s death. It is assumed that Raiders coach Hue Jackson and club CEO Amy Trask spearheaded the Palmer trade, but Mark Davis has the final call as the new owner.

On the death of his father, the 74-year-old Mike Brown took over the Bengals — and has been one of the most unpopular (and cheap) owners in the NFL for more than two decades. Palmer proclaimed after last season he would rather retire than return to the Bengals — and the two sides couldn’t settle the impasse.

Brown finally blinked — because of an eye-opening offer from the Raiders, who lost starter Jason Campbell to a broken collarbone. The last quarterback traded for two No. 1s was — you got it — Jay Cutler.

There was a suggestion that the Raiders might try to obtain Kyle Orton, who could have been had for two fifth-round picks, or less. (The Raiders and the Broncos will have new quarterbacks in their rematch Nov. 6.)

Ownership of the Broncos’ three AFC West opponents is, in essence, in the possession of sons of Pat Bowlen’s former foes and friends.

In the same year, the Orwellian 1984, that Bowlen bought the Broncos, Alex Spanos purchased the majority ownership of the Chargers; Lamar Hunt, an American Football League founder, was owner of the Chiefs; and Davis presided as dictator of the Raiders.

Now, only Bowlen remains in power.

Hunt, who died in 2006, left ownership of the team to three sons and a daughter. The 46-year-old Clark Hunt is Chiefs’ CEO.

The 88-year-old Spanos is the Chargers’ principal owner, but his eldest son Dean was placed in charge of operations in 1994. Three years ago the elder Spanos acknowledged that he has Alzheimer’s. Dean Spanos serves as the team’s chairman of the board, and his brother Michael is executive vice president.

Five other franchises have owners whose fathers and/or grandfathers were involved in NFL ownership.

The most prominent is the Rooney family.

In 1933 the late Art Rooney bought the Pittsburgh franchise in the NFL for $2,500 as a birthday gift for his 1-year-old son, Dan. Art ran the team out of a cigar box. Dan ultimately would become the owner, and now co-owns the Steelers with his son Art II, the club president. Dan and Art II purchased the shares of the other Rooney children.

Jim Irsay inherited the Colts franchise from his father Robert, who is remembered for two memorable events. Irsay traded quarterback John Elway to the Broncos, and he moved the Colts from Baltimore to Indianapolis in the middle of the night.

Virginia Halas McCaskey, the eldest daughter of pro football pioneer George Halas, owns 80 percent of the Bears. John Mara, son of the late Wellington Mara, has 50 percent ownership of the Giants, and Browns owner Randy Lerner inherited his interest from father Al.

Then there is Bowlen, the Broncos’ 67-year-old owner who has won two Super Bowls and been to five, but not lately. The last was shortly after the birth of his youngest daughter in December 1998. He has two sons and five daughters. Five are still in school, and both older daughters live in Hawaii.

In 2009, Bowlen told me none of his children had indicated an interest yet in eventually becoming the franchise’s CEO.

But son John was at training camp with his father in July.

And there is another John who someday wants to have a stake in the Broncos’ ownership.